[DMN Designer] Grid performance is dire --------------------------------------- Key: DROOLS-4735 URL: https://issues.jboss.org/browse/DROOLS-4735 Project: Drools Issue Type: Bug Components: DMN Editor Affects Versions: 7.29.0.Final Reporter: Michael Anstis Assignee: Michael Anstis Priority: Critical Labels: drools-tools There have been reports that the performance of the DMN editor's grids does not scale. On examination performance for anything other than simple examples is pretty dire.. something is seriously wrong. On closer inspection the following issues were found: - Multiple {{NodeMouseDownHandler}}, {{NodeMouseMoveHandler}} and {{NodeMouseUpHandler}} are registered because multiple {{DMNGridLayer}} are (incorrectly) instantiated due to a flaw in {{GridLienzoPanel}} and {{GridLienzoScrollHandler}}. - Calls to {{GridWidget.getHeight()}} and {{GridRow.getHeight()}} can be _very_ expensive for due to the dynamic calculation in {{ExpressionEditorGridRow}} and {{LiteralExpressionGridRow}} rows.